M7 Nuts | McMaster-Carr

These Grade 5 or Class 8 nuts are your go-to for fastening most machinery and equipment. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.

Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.

Zinc-Yellow-Chromate-Plated Steel—With a more durable finish than clear zinc plating, these nuts are suitable for most wet and outdoor environments. However, they won't hold up to the harsh chemicals that stainless steel can.

Black-Oxide Steel—Typically chosen for their appearance, these nuts have a dark, matte coating to create a finished look. They offer minimal corrosion resistance, so they're best for dry environments.

Steel—Best for dry environments since moisture will cause these nuts to rust.

	Wd., mm	Ht., mm	Fastener Strength Grade/Class	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Plated Steel



	M7 × 1 mm	11	5.5	Class 8	DIN 934	100	90591A154	00000


	Zinc-Yellow-Chromate-Plated Steel



			M7 × 1 mm	11	5.5	Class 8	DIN 934	100	97700A150	0000


			Black-Oxide Steel



					M7 × 1 mm	11	5.5	Class 8	DIN 934	25	90593A006	00000


					Steel



							M7 × 1 mm	11	5.5	Class 8	DIN 934	100	90592A018	0000

Corrosion-Resistant Stainless Steel

18-8 Stainless Steel—The choice for wet and outdoor environments, these nuts resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.

Black-Oxide 18-8 Stainless Steel—Typically chosen for their appearance, these nuts have a dark, matte coating to create a finished look. They resist rust in wet and outdoor environments, but won't hold up to the harsh chemicals that 316 stainless steel can.

Highly Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel, these nuts won't degrade when exposed to harsh weather, salt water, and most chemicals.

Highly Corrosion-Resistant Black-Oxide 316 Stainless Steel—Combines a finished appearance with the rust resistance of 316 stainless steel. Even if the coating wears off, these nuts will hold up in just about any environment, including salt water and most chemicals.

	Wd., mm	Ht., mm	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel



	M7 × 1 mm	11	5.5	DIN 934	25	91828A255	00000


	Black-Oxide 18-8 Stainless Steel



			M7 × 1 mm	11	5.5	DIN 934	10	98676A116	0000


			Highly Corrosion-Resistant 316 Stainless Steel



					M7 × 1 mm	11	5.5	DIN 934	25	94150A116	00000


					Highly Corrosion-Resistant Black-Oxide 316 Stainless Steel



							M7 × 1 mm	11	5.5	DIN 934	10	92233A117	00000

Brass

Brass—Conductive and nonmagnetic, brass nuts are commonly used to secure electrical equipment, such as circuit board assemblies and mounting brackets, inside enclosures. They're also softer than most metals, so they won't damage other fastening components.

	Wd., mm	Ht., mm	Specs. Met	Pkg. Qty.		Pkg.
Brass



	M7 × 1 mm	11	5.5	DIN 934	10	90690A052	00000

Thin-Profile Hex Nuts

About half the height of standard-profile nuts, these fit in spaces with low clearance. You can also use them as jam nuts by threading them against another hex nut to hold it in place.

Medium-Strength Steel

These Grade 5 or Class 04 nuts are your go-to for fastening most machinery and equipment. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.

Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.

	Wd., mm	Ht., mm	Fastener Strength Grade/Class	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Plated Steel



	M7 × 1 mm	11	3.5	Class 04	DIN 439B, ISO 4035	100	90695A152	000000

Nylon-Insert Locknuts

Versatile yet economical, these are the most commonly used locknuts. The nylon insert grips the screw to prevent loosening from moderate vibration without damaging threads. However, the insert may become brittle if exposed to high temperatures. These locknuts are reusable a handful of times, but the holding power decreases with each use.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Medium-Strength Steel

Image of Product. Front orientation. Locknuts. Nylon-Insert Locknuts.

These Grade 5 or Class 8 nuts are your go-to for fastening most machinery and equipment. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.

Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.

	Wd., mm	Ht., mm	Fastener Strength Grade/Class	Insert Max. Temp., ° F	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Plated Steel



	M7 × 1 mm	11	7.5	Class 8	185	DIN 985, ISO 10511	25	90576A212	00000

12-Point-Drive Flange Nuts

The star-shaped head has more points of contact than a hex head nut, so you can achieve a better grip and a tighter fit without flattening the sides of the nut. Great for cramped spaces without a lot of clearance, these nuts twist on from any angle with a standard wrench. They have a flange that distributes pressure evenly across the mounting surface without the need for a separate washer. Also known as collar nuts.

Steel

Black-Oxide Steel—Typically chosen for their appearance, these nuts have a dark, matte coating that creates a finished look. They offer minimal corrosion resistance, so they're best for dry environments.

				Flange, mm
	Thread Size	Wd., mm	Ht., mm	Dia.	Thk.		Each
Black-Oxide Steel



		M7 × 1 mm	9	7	12	1.6	90759A730	00000

Corrosion-Resistant Stainless Steel

High-Temperature A286 Stainless Steel—Stronger than 316 stainless steel and withstand high temperatures up to 1500° F. These nuts resist corrosion from chemicals, such as bleach and chlorine, but they won't hold up to salt water as well as 316 stainless steel.

				Flange, mm
	Thread Size	Wd., mm	Ht., mm	Dia.	Thk.		Each
High-Temperature A286 Stainless Steel



		M7 × 1 mm	9	7	12	1.6	90997A220	00000

Top-Lock Distorted-Thread Locknuts

Irregularly shaped threads at the top of these locknuts grip the screw for a stronger hold than nylon-insert locknuts. Although the threads prevent the nut from backing out due to vibration, they also increase the effort to install and remove. To get these nuts off, you may need special tools, such as an impact wrench or propane torch. Nuts are not reusable.

Corrosion-Resistant Stainless Steel

18-8 Stainless Steel—The choice for wet and outdoor environments, these locknuts resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.

	Wd., mm	Ht., mm	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel



	M7 × 1 mm	11	5.5	DIN 980, ISO 7042	5	90045A114	000000

Center-Lock Distorted-Thread Locknuts

Also known as reversible locknuts, these thread on from either side, so you don't have to worry about fastening them incorrectly and damaging your screw. The irregularly shaped threads in the middle grip the screw for a stronger hold than nylon-insert locknuts. Although the threads prevent the nut from backing out due to vibration, they also increase the effort to install and remove. To get these nuts off, you may need special tools, such as an impact wrench or propane torch. Nuts are not reusable.

Medium-Strength Steel

These Grade 5 or Class 8 nuts are your go-to for fastening most machinery and equipment. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.

Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.

	Wd., mm	Ht., mm	Fastener Strength Grade/Class	Pkg. Qty.		Pkg.
Zinc-Plated Steel



	M7 × 1 mm	11	5.5	Class 8	5	92048A130	00000

Metric Ultra-Precision Lead Screws and Nuts


	Style B

Operating with less backlash (play) than Metric Precision Acme Lead Screws and Nuts, these provide increased nut life and more reliable movement in automated systems. Also known as single-start and self-locking lead screws and nuts, they have a single thread that runs the length of the screw. The nut travels only when the screw turns, so your system won't unexpectedly move when the lead screw is at rest. To ensure compatibility, select components that have the same thread size, thread type, thread size, thread pitch, and number of thread starts.

Externally Threaded Nuts—Right-Hand Thread

Style B

Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

										External Thread
	Style	Thread Size	Lg.	Wd.	Ht.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Size	Lg.	Hardness	Tensile Strength	Dynamic Thrust Load Cap., lb.		Each
PEEK



		B	M3 × 0.5 mm	13/32"	0.311"	0.276"	Metric Rounded Trapezoidal	1:1	1	0.5	M7 × 0.75 mm	5/32"	Durometer 83D	Not Rated	5	90500A230	000000

Threaded Rod Sockets

The opening is designed to grip threaded rod for quick installation and removal without damaging the threads.

Chrome-Plated Steel

	Overall Lg.	OD		Each
3/8" Square Drive



	M7	1 3/4"	1"	1803N17	000000

Metric Fast-Travel Ultra-Precision Lead Screws and Nuts


	Style C

Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start. Operating with less backlash (play) than Metric Precision Acme Lead Screws and Nuts, these lead screws and nuts provide increased nut life and more reliable movement in automated systems. To ensure compatibility, select components that have the same thread size and number of thread starts.

Externally Threaded Nuts—Right-Hand Thread

Style C

Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

										External Thread
	Style	Thread Size	Lg.	Wd.	Ht.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Size	Lg.	Hardness	Tensile Strength	Dynamic Thrust Load Cap., lb.		Each
PEEK



		C	M3 × 0.5 mm	13/32"	0.311"	0.276"	Metric Rounded Trapezoidal	2:1	2	1	M7 × 0.75 mm	5/32"	Durometer 83D	Not Rated	4	4537N164	000000


		C	M3 × 0.5 mm	13/32"	0.311"	0.276"	Metric Rounded Trapezoidal	6:1	6	3	M7 × 0.75 mm	5/32"	Durometer 83D	Not Rated	4	4537N165	00000

Helical Threaded Inserts with Installation Tools

Drill Bit, Installation Tool

and Through-Hole Tap

Quickly restore stripped threads—these inserts come with through-hole taps and installation tools. The tough coils on these inserts expand once installed to anchor in a tapped hole.

Pronged—The prong attaches to an installation tool for precise control as you drive inserts in. Remove the prong with a punch or break-off tool before inserting a screw.

18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.

	For Max. Hole Dia.	No. of Inserts Included	Includes		Each
Pronged







	18-8 Stainless Steel

	M7 x 1 mm	10.5	7.25	0.281"	10	Drill Bit Installation Tool Through-Hole Tap	91732A950	000000

Helical Threaded Insert Assortments with Installation Tools

Repair damaged threads or create new ones. These convenient assortments include helical inserts, an installation tool for each thread size, a drill bit, and a tap. The inserts are also known as Heli-Coil inserts.

Pronged—The prong attaches to an installation tool for precise control as you drive inserts in. Remove the prong with a punch or break-off tool before inserting a screw.

18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.

	Drill Bit Size	For Max. Hole Dia.		Each
Pronged







	18-8 Stainless Steel

	18	Drill Bit Installation Tool M7×1 mm Thread × 10.5 mm Installed Lg. (6 Each) M7×1 mm Thread × 14 mm Installed Lg. (6 Each) M7×1 mm Thread × 7 mm Installed Lg. (6 Each) Through-Hole Tap	Coarse	9/32"	0.281"	91732A949	000000

Screw-Locking Helical Threaded Inserts

Pronged

The irregularly shaped threads tightly grip screws to prevent them from loosening or backing out under vibration. Use these inserts to create or repair threads in pumps and other machinery that shakes and rattles. Also known as Heli-Coil inserts.

Installation requires a drill bit, a helical insert tap, and an installation tool.

Pronged—The prong attaches to an installation tool for precise control as you drive inserts in. Remove the prong with a punch or break-off tool before inserting a screw.

18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.

	Inserts								Through-Hole Taps		Closed-End Hole Taps		Installation Tools		Prong Break-Off Tools
	Thread Size	Installed Lg., mm	Drill Bit Size, mm	For Max. Hole Dia., mm	Specs. Met	Pkg. Qty.		Pkg.		Each		Each		Each		Each
Pronged







				18-8 Stainless Steel

				M7 x 1 mm	7	7.3	7.3	SAE MA3329-107	10	90296A311	00000	91709A203	000000	91709A536	000000	90261A193	0000000	92955A205	0000000


				M7 x 1 mm	10.5	7.3	7.3	SAE MA3329-157	10	90296A312	0000	91709A203	00000	91709A536	00000	90261A193	000000	92955A205	000000
				M7 x 1 mm	14	7.3	7.3	DIN 8140, SAE MA3329-207	5	90296A313	0000	91709A203	00000	91709A536	00000	90261A193	000000	92955A205	000000

Helical Threaded Inserts

Pronged

Restore, reinforce, or create threads in metal. The tough coils on these inserts expand once installed to anchor in a tapped hole. Also known as Heli-Coil inserts, they're often used in engine heads and machinery housings where strong connections are critical. Unlike threadlocking inserts, you can remove and reuse them without them losing their strength.

Installation requires a drill bit, a helical insert tap, and an installation tool.

Pronged—The prong attaches to an installation tool for precise control as you drive inserts in. Remove the prong with a punch or break-off tool before inserting a screw.

18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.

	Inserts								Through-Hole Taps		Closed-End Hole Taps		Installation Tools		Prong Break-Off Tools		Inserts with Installation Tools
	Thread Size	Installed Lg., mm	Drill Bit Size, mm	For Max. Hole Dia., mm	Specs. Met	Pkg. Qty.		Pkg.		Each		Each		Each		Each	No. of Inserts Included		Each
Pronged







				18-8 Stainless Steel

				M7 x 1 mm	7	7.3	7.3	DIN 8140, SAE MA3279-107	10	91732A639	00000	91709A203	000000	91709A536	000000	90261A193	0000000	92955A205	0000000	—	———	0


				M7 x 1 mm	10.5	7.3	7.3	DIN 8140, SAE MA3279-157	10	91732A263	0000	91709A203	00000	91709A536	00000	90261A193	000000	92955A205	000000	10	91732A950	000000
				M7 x 1 mm	14	7.3	7.3	DIN 8140, SAE MA3279-207	10	91732A785	00000	91709A203	00000	91709A536	00000	90261A193	000000	92955A205	000000	—	———	0

Extraction Tools

Remove installed helical inserts.

For Pronged Helical Inserts—Place the tip into pronged inserts and lightly strike the tool’s head. Then, turn the tool counterclockwise with pressure to extract the insert.

		Each
For Pronged Helical Inserts



	10-24, 10-32, 12-24, 12-28, 1/4"-20, 1/4"-28, 1/4"-32, 1/4"-80, 5/16"-18, 5/16"-24, 5/16"-32, 3/8"-16, 3/8"-24, M5, M6, M7, M8, M10	90254A320	000000